| 释义 |
raphespinal fibers ra·phe·spi·nal fi·bersnerve fibers originating from cells of the nuclei raphe magnus, pallidus, and obscurus of the pons and medulla and terminating in the spinal cord gray matter; fibers involved in the descending inhibition of nociceptive input in the dorsal (posterior) horn; they contain serotonin. |